01 - Toast the bread slices to your preferred level of crispness using a toaster or grill pan.
02 - Halve the avocado, remove the pit, and scoop the flesh into a small bowl. Add lime juice, salt, and pepper, then mash with a fork until nearly smooth.
03 - Divide the mashed avocado evenly and spread a generous layer over each toasted bread slice.
04 - Top each toast with an equal portion of chopped kimchi, spreading it across the surface.
05 - Sprinkle with toasted sesame seeds and chopped green onions. Add red pepper flakes or a light drizzle of sesame oil if desired. Serve immediately while the toast is still warm and crisp.